Disk operating system is system of computer

1. DISK OPERATING
SYSTEM
PRESENTED BY:-
HARSHIT MANGAL
&
NAMAN CHOUBEY

2. INTRODUCTION
 DOS stands for Disk Operating System.
 DOS is a Operating System For Using the Computer.
 DOS was first widely installed Operating System for Computers.
 DOS control’s the Computer Hardware and Provides an
environment for Program to run

3.  DOS is an operating system which help to set-up the
communication between the Hardware & Software of Computer
to operate the Memory.
 DOS is a single user operating system. Single user Operating
System is most popular in micro-computer upto mid of 1990’s .
It’s also called DOS because it is store on a Disk of a Computer

4. COMMAND
 The Written Instructions Input by USER in Computer for any type
of working in DOS are called COMMAND.
 Different types of command using for different types of works in
DOS.

5. TYPES OF COMMAND
There are two types of Command in Disk
operating System –
i. INTERNAL COMMAND
ii.EXTERNAL COMMAND

6. COMMAND
INTERNAL COMMAND
• These are those commands which are contained
in files of MS-DOS.
• These are those functions that are built into the
command interpreter.
• There is no need of any external file in computer
to read internal MS-DOS command.
• Internal commands do not vary from system to
system.
• These commands can be used as long as DOS is
running on the system.
EXTERNAL COMMAND
• These are those commands which are not in-
built in MS-DOS.
• These are those which are not included in the
interpreter.
• There is a need of an internal file in the
computer to read external MS-DOS command.
• External command may vary from system to
system.
• This means any two computers with same
version of MS-DOS may have same internal
commands, but may have different external
commands.

7. DOS Internal Commands
Some DOS internal Commands are-
 DATE - Date stands for check the date of computer
 CLS - CLS is use for clear the screen
 VER - Display the DOS version Number
 VOL - Display the Volume level and serial
 TYPE - Display the contents of text.
 COPY - Create a duplicate copy of file
 MD - For making a New Directory

8. DOS External Commands
Some DOS External Commands are-
 CHKDSK - Check the validity of disk and reports the total space, number
of files and amount of free space
 COMMAND - Start the Command Processor
 COMP - Compare the contents of two sets of files
 +H / -H - For Hide any file/ Unhide of the hidden file
 +R / -R - Convert File to Read-only/ convert into Normal mode
 FIND - To find the Character or Word of file
 MODE- Set up the command screen of different modes

9. How to access Command Prompt ?
Command prompt is easy to access, there are 4 common ways:
1. Type "cmd" in the start menu's search box and press enter.
2. Click on Run, then type "cmd" and press enter.
3. Click on all programs in the start menu, click accessories and then click on command prompt.
4. In Windows explorer, go to your hard drive's root and open the Windows directory, from here
open the system 32 directory and then scroll down until you find Command Prompt.

10. HOW TO USE COMMAND?
= ENTER
Syntax C:> COMMAND

11. THANK YOU